Assuming there are no external problems - possibilities are, pump drive disengaged or broken, pump broken, low hydraulic fluid level, blocked filter, relief valve stuck open, control valve stuck or broken. First task is to ensure the pump is being driven, it has an adequate supply of fluid and it is producing sufficient hydraulic pressure...
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Assuming there are no external problems - possibilities are, pump drive disengaged or broken, pump broken, low hydraulic fluid level, blocked filter, relief valve stuck open, control valve stuck or broken.
First task is to ensure the pump is being driven, it has an adequate supply of fluid and it is producing sufficient hydraulic pressure...